feat(perf-issues): respect span render blocking status in detector #44981
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As of browser SDK 7.38.0, we now log the render-blocking status reported by the browser in resource spans' `data` hash. If a value is present and that value is `non-blocking`, ignore our heuristics and treat the value as non-blocking. This commit also updates each test case to start from a valid event and then minimally mutate it into an invalid one, because I was losing confidence that each test was really testing what it should.
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Scope: Backend
k-fish
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Feb 22, 2023
| @@ -485,13 +485,17 @@ def visit_span(self, span: Span): | |||
| self.fcp = None | |||
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| def _is_blocking_render(self, span): | |||
| data = span.get("data", None) | |||
| render_blocking_status = data and data.get("resource.render_blocking_status") | |||
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Suggested change
| render_blocking_status = data and data.get("resource.render_blocking_status") | |
| render_blocking_status = data and data.get("resource.render_blocking_status", None) |
protect against missing field? or nah
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As of browser SDK 7.38.0, we now log the render-blocking status reported by the browser in resource spans'
datahash. (Background info: MDN). If a value is present and that span isnon-blocking, ignore our heuristics and treat the resource as non-blocking in the Large Render Blocking Asset detector.This PR also updates each test case to start from a valid event and then minimally mutate it into an invalid one, because I was losing confidence that each test was really testing what it should.